The Detachable Battery Pack, HTR-08 is used exclusively for Fujikura Arc Fusion Splicer, FSM-60S, FSM-60R, FSM-18S,,FSM-18R.SPECIFICATIONS Model: HTR-08 Type: LITHIUM Battery Output voltage: 12.6V Battery capacity: 7800mAh Battery charger: Exclusive Battery charger Expected battery cycle life: Max. 1000 cycles Battery capacity indicator: Available with 4-step LED Operating condition: -10 to +50 degree C / Non dew Dimension, Weight: 120W x 117D x 38H (mm), 0.6kg No.of FSM-60S splicer operation(Spliceing/ tube heating):300 cyclesUse for: FSM-60S, FSM-60R, FSM-18S,,FSM-18R.